0x80020009 hresult System.Runtime.InteropServices.COMException

How can I debug this exception please? It is intermittent when it throws, I have tried a different bit of hardware and same issue. I can clear when it happens, by using the application that came with the hardware to search for the device, close program, then use my c# application to connect.

Exception thrown: 'System.Runtime.InteropServices.COMException' in ZGControlTest.exe
Exception occurred. (Exception from HRESULT: 0x80020009 (DISP_E_EXCEPTION))

I have extensively googled but most people have issues with sharepoint or excel.

I have found there's a

_complusexceptioncode 0434352

Which I'm currently trying to find out what is causing.

Thanks